Iframe Resizer
Keep same and cross domain iFrames sized to their content with support for window/content resizing, nesting and multiple iFrames. (Dependency free, IE8+)
Quasar
Quasar Framework
Xui
A tiny javascript framework for mobile web apps.
JS Plumb
jQuery/MooTools/YUI3 Javascript library that lets you connect parts of your UI together.
Chardin.js
Simple overlay instructions for your apps.
Faker.js
generate massive amounts of fake data in Node.js and the browser